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时间:2020-04-21
《不同形貌ZnO@PANI纳米复合材料的制备及光催化性质-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第29卷第10期无机化学学报V01.29No.102013年10月CHINESEJ0URNALOFIN0RGANICCHEMISTRY2091—2098不同形貌ZnO@PANI纳米复合材料的制备及光催化性质吴振玉李奉杰李村朱维菊方敏(安徽大学化学化工学院,合肥230601)摘要:采用直接沉淀法和水热合成法制备出形貌和尺寸比较均一的颗粒状、棒状和球形花状的纳米Zn0。使用硅烷偶联剂KH.42(苯胺甲基三乙氧基硅烷,CH.NH。CH一Si(OCH3)3)X~)Jf得纳米ZnO进行表面化学修饰,修饰后的纳米ZnO(m.ZnO1.经由
2、皮克林乳液聚合法使苯胺单体在其表面聚合,形成聚苯胺(PANI)包覆的氧化锌纳米复合材料fm.ZO@PANI),采用XRD、SEM、HRTEM、FrIR、UV—Vis、TG等对样品进行表征;研究了1TI—ZnO@PANI纳米复合材料对亚甲基蓝(MB)的光催化性能。结果表明.复合材料对可见光也有较强的吸收,在紫外、可见光照射下都有较好的光催化降解效率。其中.棒状Z0纳米复合材料的光催化降解性能最好,它的紫外一可见光和可见光光催化降解率分别达到98.2%和97.1%,而且复合材料的光催化性能稳定.二次循环的紫外一可见光催化降解率仍达
3、到96.0%关键词:纳米氧化锌;聚苯胺;复合材料;光催化中图分类号:0643.36文献标识码:A文章编号:1001—4861(2013)10—2091—08DOI:10.3969~.issn.1001—4861.2013.00.245PreparationandPhotocatalyticPropertiesofDiferentMorphologicalZnO@PANINanocompositesWUZhen-YuLIFeng-JieLICunZHUWei—JuFANGMin(SchoolofChemistryandChemi
4、calEngineering,AnhuiUniversity,H230601,China)Abstract:Theparticle,rod,andsphericalflower-likenano—ZnOwiththeuni~rmmorphologyandsizewerepreparedthroughasimpledirectprecipitationmethodandhydrothermalmethod.Thennano—ZnOwasmodifiedbythesilanecouplingagentanilino—methyl-
5、triethoxysilane(KH一42)(m-ZnO),andthenanocompositesconsistedofm—ZnOandpolyaniline(m—ZnO@PANI)weresynthesizedbyPickeringemulsionpolymerizationmethod.XRD,SEM,HRTEM,FTIR,UV—Vis,TGwereusedtocharacterizetheshape,compositionandstructureofthenano-ZnOandm—ZnO@PANInanocomposi
6、te.Thephotocatalyticactivityofm-ZnO@PANInanocompositesunderUV-visandvisiblelightirradiationwasevaluatedbyusingnanocompositesasphotocatalyststodegrademethyleneblue(MB)dyemoleculesinaqueoussolution.TheresultsindicatethatthenanocompositeshavestrongabsorptionofUVandvisi
7、blelightandgoodphotocatalyticefficiencyunderUV—Visandvisiblelightiradiation.Thephotocatalyticeficiencyoftherodnanocompositeisthebestamongthem.ThephotodegradationratesunderUV-Visiradiationandvisiblelightirradiationare98.2%and97.1%respectively.Furthermore.therecycledp
8、hotodegradationeficiencyofnanocompositeisstableandthesecondcyclephotodegradationrateunderUV-Visirradiationwas96.0%.Keywords:nano—ZnO;PANI;
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